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| /**
| * @param {string} value
| * @returns {RegExp}
| * */
|
| /**
| * @param {RegExp | string } re
| * @returns {string}
| */
| function source(re) {
| if (!re) return null;
| if (typeof re === "string") return re;
|
| return re.source;
| }
|
| /**
| * @param {...(RegExp | string) } args
| * @returns {string}
| */
| function concat(...args) {
| const joined = args.map((x) => source(x)).join("");
| return joined;
| }
|
| /*
| Language: Augmented Backus-Naur Form
| Author: Alex McKibben <alex@nullscope.net>
| Website: https://tools.ietf.org/html/rfc5234
| Audit: 2020
| */
|
| /** @type LanguageFn */
| function abnf(hljs) {
| const regexes = {
| ruleDeclaration: /^[a-zA-Z][a-zA-Z0-9-]*/,
| unexpectedChars: /[!@#$^&',?+~`|:]/
| };
|
| const keywords = [
| "ALPHA",
| "BIT",
| "CHAR",
| "CR",
| "CRLF",
| "CTL",
| "DIGIT",
| "DQUOTE",
| "HEXDIG",
| "HTAB",
| "LF",
| "LWSP",
| "OCTET",
| "SP",
| "VCHAR",
| "WSP"
| ];
|
| const commentMode = hljs.COMMENT(/;/, /$/);
|
| const terminalBinaryMode = {
| className: "symbol",
| begin: /%b[0-1]+(-[0-1]+|(\.[0-1]+)+){0,1}/
| };
|
| const terminalDecimalMode = {
| className: "symbol",
| begin: /%d[0-9]+(-[0-9]+|(\.[0-9]+)+){0,1}/
| };
|
| const terminalHexadecimalMode = {
| className: "symbol",
| begin: /%x[0-9A-F]+(-[0-9A-F]+|(\.[0-9A-F]+)+){0,1}/
| };
|
| const caseSensitivityIndicatorMode = {
| className: "symbol",
| begin: /%[si]/
| };
|
| const ruleDeclarationMode = {
| className: "attribute",
| begin: concat(regexes.ruleDeclaration, /(?=\s*=)/)
| };
|
| return {
| name: 'Augmented Backus-Naur Form',
| illegal: regexes.unexpectedChars,
| keywords: keywords,
| contains: [
| ruleDeclarationMode,
| commentMode,
| terminalBinaryMode,
| terminalDecimalMode,
| terminalHexadecimalMode,
| caseSensitivityIndicatorMode,
| hljs.QUOTE_STRING_MODE,
| hljs.NUMBER_MODE
| ]
| };
| }
|
| module.exports = abnf;
|
|
